But once the enforcement is gone so is the change. The best control would be to have squad cars driving up and down the road. The more visible they are, the more people will show down.the focus is on tickets and changing behavior. Believe it or not, highly visible, frequent enforcement does change crash trends. I have seen it in action personally. With modern technology like Wayze and FB, highly visible enforcement gets even more visibility and folks tend to straighten up and drive right, which results in fewer crashes.